Feeding mechanism for sewing-machines



(No Model.)

'2 Sheets-Sheet 1. P. DIEHL. FEEDING MECHANISM FOR SEWINGMAGHINES. No. 319,800. Patented June .9, .1885.

v 3 V tq Q I WITNESSES: IN VEN TOR:

N. FEYERS. PhoIv-ljkhognpher, Walh'ulgtnn. D C.

(No ModeL) 2 Sheets-Sheet '2. P. DIEHL.

FEEDING MECHANISM FOR SEWING MACHINES;

No. 319,800. Patented June 9. 1885.

WITNESSES:

Y INVBNTOR: 52am 1%5 9 Zzleo n. PETERS. PhomLithognpher. Walhinglan, u, c

' UNiTEn STATES PATENT' ()EEPica.

PHILIP DIEHL, OF ELIZABETH, NEw JERSEY, ASSIGNOR TO THE SINGER MANUFACTURING COMPANY on NEW JEnsEY.

FEEDING MECHANISM FOR SEWING-MACHINES.

SPECIFICATION forming part of Letters Patent No. 319,800, dated June 9; 1885.

Application filed February 10, 1885. (No model.)'

T at whom it may concern.-

Be it known that I, PHILIP DIEHL, a citizen of the United States, residing at Elizabeth, in the county of Union and State of New Jersey, have invented certain new and useful Improvementsin FeedingMechanisms for Sewing-Machines,of which the following is a specification, reference being had therein to the accompanying drawings.

My invention relates to afeeding mechanism more particularly intended for that class of sewing-machines having the work-support in the form of an arm or horn, whereby the maarm.

chines are adapted for sewing hollow or tubular articles.

My invention comprises a rock-shaft, the oscillations of which may be varied, an oscillating disk carried by said shaft, a feed-bar sliding vertically in said disk and provided with a feed-dog, and a second shaft having a cam working in a slotted opening in said feedbar, and thus serving to raise and lower the latter at proper intervals.

In the drawings, Figurel is a sectional side elevatipn of a sewing-machine embodying my invention. Fig. 2 is a section of the same through the vertical portion of the bracket- Fig. 3 is a cross-section through the forward end of the work-supporting arm,showing the feed-bar and its carrying-disk in elevation. Fig. 4 is a central section through the forward end of the work-supporting arm. Fig. 5 is a side view of the oscillating disk and part of its rock-shaft, and Fig. 6 a face view of said disk. Fig. 7 is a detail face viewof the feedbar and its feed-dog, and Fig. 8 a side view of the same.

I have herein shown my invention as applied to a sewing-machine having a shuttlecarrying rock-shaft, A, operated in the manner described in Patent No. 208,838,dated October 8, 1878, and a feeding rock-shaft, B, receiving its movements from a cam on the upper shaft of the machine by the mechanism described in Patent No. 229,629,dated July 6, 1880, both of these patents having been granted to L. B. Miller and myself. The movements of the rock-shaft B are capable of being varied by a regulator, O, as fully set forth in the patent last referred to. I do not, however, wish to be understood as limiting my invention to the particular mechanism above referred to for operating the shafts A and B,nor is it necessary that the shaft A should be a rock-shaft, as it might have a continuous rotary instead of an oscillatory movement and still properly perform its functions, as hereinafter described, in operating the feed-bar. The shaft A is provided at its forward end with a shuttle-driver, a, and just back of said driver is a feed-cam, a. The rock-shaft B carries at its forward end a disk, I), which is herein shown as being formed integral with said shaft. The disk I) is provided with an undercut recess, 1), forming guiding-ways,and in said recess is fitted the vertically-sliding feed-bar D, and to the latter is attached the feed-dog E. The cam a works in a slotted opening, d, in the feed-bar D, said cam in its rotations impinging against the horizontal walls only of said opening, thus imparting positive vertical movements to said bar at proper intervals.

It will be understood that the movements of the two operating shafts are so timed that the oscillating disk by which the feed-bar is moved horizontally will be stationary, or nearly so, during the times when said bar is being moved vertically by the cam a,and thus a feed which is practically a four-motioned one and which is positive in all directions will be produced.

As the oscillating movements of the shaft B, and thus of the disk b carried thereby,may be varied at will, it is obvious that the horizontal or feeding movements of the feed-bar and its dog may be regulated to produce any desired length of stitch.

I claim as my invention- 1. In a sewing machine, the combination, with a rock-shaft having a disk, of a feed-bar adapted to slide vertically in ways in said disk, said bar carrying a feed-dog and being provided with an opening, a cam working in said opening, and a shaft by which said cam is carried, substantially as set forth.

2. In a sewing-machine, the combination of a rock-shaft having a disk, a regulator for varying the movements of said rock-shaft,a feedbar movable vertically in said disk and having an opening, a feed-dog carried by said bar, a cam working in said opening, and a. In testimony whereof I afiix my signature 1o shaft by which said cam is carried, substanin presence of two witnesses. tially as set forth.

3. The combination, with the rock-shaft A, PHILIP DIEHL.

5 having cam a, of the rock-shaft B, having the recessed disk b, the feed-bar D, adapted to Witnesses: i slide vertically in said disk, and having the JAMES REID, 5 opening d and the feed-dog E, substantially JOSEPH F. JAQUI'IH.

as set forth. 

